Photoshop Express is mostly intuitive but there is a complex interaction between auto-fix and manual adjustments which needs to be explained. For example, an auto-fix button appears on the left of some manual adjustment sliders (see image) but not others. Why is this? Also, is it possible to apply auto-fix and then fine tune this with the manual sliders? In some cases the manual sliders seem to reset auto-fix but in other cases not.